Title:
PWM CONTROL-BASED MOTOR PHASE CURRENT MEASUREMENT METHOD AND AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2021/043240
Kind Code:
A1
Abstract:
Provided are a pulse-width modulation (PWM) control-based motor phase current measurement method and air conditioner; said phase current measurement method comprises: during the process of starting a motor, measuring a current signal of a DC bus of the motor (S100); while measuring the current signal of the DC bus, reducing the PWM carrier frequency of the motor (S200); calculating the phase current of the motor according to the current signal of the DC bus (S300). By means of measuring the current signal of the DC bus of the motor, the PWM carrier frequency of the motor is reduced, increasing the duration of the current waveform, such that it is easier to collect the current and the collected current is more accurate.
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Inventors:
FENG ZHENGYANG (CN)
SHAO HAIZHU (CN)
GENG YAN (CN)
SHI BIN (CN)
CONG ANPING (CN)
ZHANG BO (CN)
SHAO HAIZHU (CN)
GENG YAN (CN)
SHI BIN (CN)
CONG ANPING (CN)
ZHANG BO (CN)
Application Number:
PCT/CN2020/113397
Publication Date:
March 11, 2021
Filing Date:
September 04, 2020
Export Citation:
Assignee:
QINGDAO HAIER AIR CONDITIONING ELECTRONIC CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
H02P1/42
Foreign References:
| CN101378235A | 2009-03-04 | |||
| CN101769953A | 2010-07-07 | |||
| US20160094177A1 | 2016-03-31 | |||
| CN1756070A | 2006-04-05 |
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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